In finish machining of an island on a casting with CNC milling

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In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed, The corner points of the Island are represented by (0, 0), (0, 30), (60, 30) and (50, 0). By applying cutter radius compensation, the trajectory of the cutter will be

1. (-5, 0), (-5, 35), (55, 35), (55, -5), (-5, 5)
2. (0, -5), (55, -5). (55, 35), (-5, 35), (-5, -5)
3. (5,5), (5, 25), (45,25),(45, 5), (5, 5)
4. (5, 5), (45, 5), (45, 25), (5, 25), (5, 5)

Correct Option: B

Given = Dia of end milling cutter = 10 mm